Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net

Pull networking fixes from David Miller:

 1) Fix hotplug deadlock in hv_netvsc, from Stephen Hemminger.

 2) Fix double-free in rmnet driver, from Dan Carpenter.

 3) INET connection socket layer can double put request sockets, fix
    from Eric Dumazet.

 4) Don't match collect metadata-mode tunnels if the device is down,
    from Haishuang Yan.

 5) Do not perform TSO6/GSO on ipv6 packets with extensions headers in
    be2net driver, from Suresh Reddy.

 6) Fix scaling error in gen_estimator, from Eric Dumazet.

 7) Fix 64-bit statistics deadlock in systemport driver, from Florian
    Fainelli.

 8) Fix use-after-free in sctp_sock_dump, from Xin Long.

 9) Reject invalid BPF_END instructions in verifier, from Edward Cree.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (43 commits)
  mlxsw: spectrum_router: Only handle IPv4 and IPv6 events
  Documentation: link in networking docs
  tcp: fix data delivery rate
  bpf/verifier: reject BPF_ALU64|BPF_END
  sctp: do not mark sk dumped when inet_sctp_diag_fill returns err
  sctp: fix an use-after-free issue in sctp_sock_dump
  netvsc: increase default receive buffer size
  tcp: update skb->skb_mstamp more carefully
  net: ipv4: fix l3slave check for index returned in IP_PKTINFO
  net: smsc911x: Quieten netif during suspend
  net: systemport: Fix 64-bit stats deadlock
  net: vrf: avoid gcc-4.6 warning
  qed: remove unnecessary call to memset
  tg3: clean up redundant initialization of tnapi
  tls: make tls_sw_free_resources static
  sctp: potential read out of bounds in sctp_ulpevent_type_enabled()
  MAINTAINERS: review Renesas DT bindings as well
  net_sched: gen_estimator: fix scaling error in bytes/packets samples
  nfp: wait for the NSP resource to appear on boot
  nfp: wait for board state before talking to the NSP
  ...

1 files changed, 26 insertions, 12 deletions

diff --git a/net/core/filter.c b/net/core/filter.c
index 3a50a9b021e2..24dd33dd9f04 100644
--- a/net/core/filter.c
+++ b/net/core/filter.c
@@ -2506,21 +2506,19 @@ static int xdp_do_redirect_map(struct net_device *dev, struct xdp_buff *xdp,
 	struct redirect_info *ri = this_cpu_ptr(&redirect_info);
 	const struct bpf_prog *map_owner = ri->map_owner;
 	struct bpf_map *map = ri->map;
+	struct net_device *fwd = NULL;
 	u32 index = ri->ifindex;
-	struct net_device *fwd;
 	int err;
 
 	ri->ifindex = 0;
 	ri->map = NULL;
 	ri->map_owner = NULL;
 
-	/* This is really only caused by a deliberately crappy
-	 * BPF program, normally we would never hit that case,
-	 * so no need to inform someone via tracepoints either,
-	 * just bail out.
-	 */
-	if (unlikely(map_owner != xdp_prog))
-		return -EINVAL;
+	if (unlikely(map_owner != xdp_prog)) {
+		err = -EFAULT;
+		map = NULL;
+		goto err;
+	}
 
 	fwd = __dev_map_lookup_elem(map, index);
 	if (!fwd) {
@@ -2576,13 +2574,27 @@ int xdp_do_generic_redirect(struct net_device *dev, struct sk_buff *skb,
 			    struct bpf_prog *xdp_prog)
 {
 	struct redirect_info *ri = this_cpu_ptr(&redirect_info);
+	const struct bpf_prog *map_owner = ri->map_owner;
+	struct bpf_map *map = ri->map;
+	struct net_device *fwd = NULL;
 	u32 index = ri->ifindex;
-	struct net_device *fwd;
 	unsigned int len;
 	int err = 0;
 
-	fwd = dev_get_by_index_rcu(dev_net(dev), index);
 	ri->ifindex = 0;
+	ri->map = NULL;
+	ri->map_owner = NULL;
+
+	if (map) {
+		if (unlikely(map_owner != xdp_prog)) {
+			err = -EFAULT;
+			map = NULL;
+			goto err;
+		}
+		fwd = __dev_map_lookup_elem(map, index);
+	} else {
+		fwd = dev_get_by_index_rcu(dev_net(dev), index);
+	}
 	if (unlikely(!fwd)) {
 		err = -EINVAL;
 		goto err;
@@ -2600,10 +2612,12 @@ int xdp_do_generic_redirect(struct net_device *dev, struct sk_buff *skb,
 	}
 
 	skb->dev = fwd;
-	_trace_xdp_redirect(dev, xdp_prog, index);
+	map ? _trace_xdp_redirect_map(dev, xdp_prog, fwd, map, index)
+		: _trace_xdp_redirect(dev, xdp_prog, index);
 	return 0;
 err:
-	_trace_xdp_redirect_err(dev, xdp_prog, index, err);
+	map ? _trace_xdp_redirect_map_err(dev, xdp_prog, fwd, map, index, err)
+		: _trace_xdp_redirect_err(dev, xdp_prog, index, err);
 	return err;
 }
 EXPORT_SYMBOL_GPL(xdp_do_generic_redirect);